high pressure acid leaching for extraction rock asphalt
Full article: The Direct Leaching of Nickel Sulfide Flotation ...
2022.5.16 High pressure acid leaching (HPAL) is the preferred method for the extraction of Ni and Co from oxide (limonite) and clay silicate type ores to produce a diverse range of products (i.e. mixed sulfide precipitate, mixed hydroxide precipitate, metal
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Valuable metals substance flow analysis in high-pressure
2023.7.27 High-pressure acid leaching (HPAL) and atmospheric acid leaching (AL) are the − two prevailing technologies for hydrometallurgical processing of laterites [16 −
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High pressure acid leaching of a refractory lateritic nickel ore
2011.9.1 This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite
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Review on Comprehensive Recovery Valuable Metals and
2023.3.3 Researchers achieved leaching rates of Ni, Co, and Cu of more than 90% within 15 min using high oxygen pressure acid leaching technique, and extraction rates
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Recovery of extra-heavy oil and minerals from carbonate
recovery process to the asphalt rocks by reactive ’ extraction. As shown in Fig. 1, a schematic of reactive extraction to recover all of materials from the asphalt rocks has
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Recovery of extra-heavy oil and minerals from carbonate asphalt rocks ...
2019.5.8 The main purposes are to: (i) find out the effects of operation conditions on extraction efficiency; (ii) understand the roles of formic acid in reactive extraction for
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Metals Free Full-Text The Use of Acid Leaching to Recover
2023.10.10 High-pressure leaching tests examined factors like acid concentration, oxygen pressure, temperature, pulp density, free acid, and iron precipitation. Conducted
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High Pressure Acid Leach - Caldera Engineering
Overview. High Pressure Acid Leach (HPAL) is a process used to extract nickel and cobalt from laterite ore bodies. The HPAL process utilizes elevated temperatures (roughly 255 degrees Celsius), elevated
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Leaching behavior of metals from limonitic laterite ore by high ...
2011.1.1 Abstract. The leaching behavior of metals from a nickeliferous limonitic laterite ore was investigated by high pressure acid leaching process for the extraction of
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Author's personal copy - ResearchGate
4 天之前 High pressure acid leaching experiments were conducted in a Parr-4532 model, 2 l, titanium grade-4 autoclave which was equipped with automatic heating and cooling
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Silver Metal Extraction from Refractory Silver Ore Using
2021.1.28 The dissolved silver increased slightly with the increase in the temperature for both leaching media. As seen Fig. 7, the silver dissolution in atmospheric pressure and high pressure increased from 55.29% at 25 °C to 57.64% at 90 °C and from 54.11% at 25 °C (10 atm) to 62.35% at 150 °C (18 atm), respectively.
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Method for extraction and analysis of per- and poly
2022.4.13 The extraction method comparison (Core 1) and influence of method parameters (e.g., sonication temperature, sample composition and spike level) studies (Core 1 and Core 2) for measurement of PFAS in asphalt occurred on bulk material prepared from cores collected on the runway apron (taxiway).A bulk material was prepared using
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Open Access proceedings Journal of Physics: Conference
for high-pressure acid leaching (HPAL) of laterite ores was built in Moa Bay, Cuba. Since then, it was not until the 1990s, and beyond, new HPAL plants were built that are currently operating in Australia, Philippines, New Caledonia, Papua New Guinea and Turkey [5]. All of these HPAL plants have been operated under typical high-temperature ...
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High pressure acid leaching of a refractory lateritic nickel ore
2011.9.1 This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite ore from the Gördes region of Manisa in Turkey. By optimizing the basic HPAL process parameters: leaching at 255 °C with 0.30 sulfuric acid to ore weight ratio with a particle ...
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Agglomeration and column leaching behaviour of nickel laterite
2014.5.1 Atmospheric acid leaching has attracted great attention from scientists due to the mild leaching conditions. However, the leaching efficiency of nickel is lower than that using high pressure acid leaching. Herein, we report the use of a surfactant (e.g., stearyltrimethyl ammonium chloride, STAC) to improve the leaching efficiency of Ni.
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Comparative atmospheric leaching characteristics of scandium
2021.11.1 Scandium together with Ni and Co are usually leached by the high pressure acid leaching method, then concentration and separation of scandium from the pregnant leach solution (PLS) by using the pH-controlled precipitation method (Kaya et al., 2017) or solvent extraction method (Ferizoglu et al., 2018). However, as the grade of
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Mineralizing CO2 and producing polymorphic calcium
2023.2.1 A leaching solution containing a high concentration of calcium ions was subjected to injecting CO 2 gas at a pressure of 55 kg/cm 2 (5.4 MPa) and various flow rates of 1, 1.5, 2, 3, and 4 L/min over time in an extraction reactor. The experiment was then terminated when the pH of the solution reached 8.
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Metal Extraction SpringerLink
2021.11.30 This scenario is called Acid Rock Drainage (ARD). This natural process is sometimes referred to as acid mine drainage because it is commonly associated with mining activities. ... 5.4.5 Pressure Leaching of High Grade Ores and Concentrates. Pressure leaching is the process of aqueous metal extraction under high pressure conditions.
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Review on metal extraction technologies suitable for critical
2022.5.31 Pressure leaching was introduced in the 1950′s to leach sulphide concentrates, laterites, and tungsten ores, and to precipitate metals directly from solution (Habashi, 2005b). There are several types of pressure leaching processes now in use including high pressure acid leaching (HPAL or simply PAL) and alkaline pressure
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Recovery of extra-heavy oil and minerals from carbonate
asphalt rock is a carbonate unconventional oil ore with the advantages of high oil content (20–50 wt% of ores) and huge reserves ( 1 billion barrels in situ).2,3 Different technologies have been proposed for asphalt recovery. The hot water-based extraction (HWBE) process has been industrialized in Alberta,
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Extraction of Nickel from Oxidized Nickel Ores by Heap Leaching ...
2022.9.28 A characteristic feature of serpentine oxidized nickel ores (ONO) of the Serov deposit (≈ 1 wt.% Ni) is the increased content of iron and magnesium. The main nickel-containing phases are lizardite, antigorite, clinochlore and iron oxides with the nickel content varying from 1.6 to 9.2 wt.%.Heap (percolation) leaching with aqueous H2SO4
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Selective extraction of rare earth elements from red mud
2022.12.1 The practicable approach by multi-stage extraction of acid leaching and roasting can split iron and REEs from red mud. Graphical Abstract. Download : Download high-res image (188KB) Download : Download full ... Selective rare earth element extraction using high-pressure acid leaching of slags arising from the smelting of bauxite residue.
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Review on metal extraction technologies suitable for critical
2022.5.31 Phytomining (or agromining) involves cultivating selected plants known as hyperaccumulators on metal-rich soils to extract high value metals for profit (Corzo Remigio et al., 2020, Nkrumah et al., 2018b, van der Ent et al., 2021). ... High pressure acid leaching of a refractory lateritic nickel ore. ... Sulphidic waste rock and tailings ...
MoreResearch on High-Pressure Hydrochloric Acid Leaching of
2021.3.12 Red mud is a hazardous waste of the alumina industry that contains high amounts of iron, aluminum, titanium and rare-earth elements (REEs). One of the promising methods for the extraction of iron from red mud is carbothermic reduction with the addition of sodium salts. This research focuses on the process of hydrochloric high-pressure acid
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Enhanced lithium extraction from α-spodumene with
2021.12.1 In this study, a novel lithium extraction method was proposed for α-spodumene by combining activated roasting and sulfuric acid leaching. First, the thermodynamics of the roasting process demonstrated that α -spodumene was converted into β -spodumene, which reacted with CaO to produce acid-soluble LiAlSiO 4 and
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A life cycle assessment of a new laterite processing technology
2017.1.20 This paper presents a life cycle assessment (LCA) study of three nickel laterite processing technologies.The main goal was to quantify selected environmental impact categories and to compare and analyse each impact category for three different nickel feedstock for stainless steel production. The nickel laterite processing routes were
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Gold and Silver Extraction SpringerLink
2019.12.15 The pressure oxidation technology was then applied to treat zinc concentrates at Cominco zinc operation in Trail, British Columbia in Canada during the 1970s. Several new acid-pressure-leaching plants were built to treat nickel-copper mattes for the platinum mining industry during the 1980s (Thomas 2005). It was also applied to treat
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Minerals Free Full-Text Study of Copper Leaching from
2020.8.24 This recovery is carried out through leaching in 0.05, 0.10, 0.15 and 0.20 molar Sulphuric Acid solutions, at ambient temperature and atmospheric pressure. The exposure of the waste to the solution was made for 96 h, taking measurements of the leaching and evaluating the increase in Copper concentration every 24 h.
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Kinetics of Atmospheric Leaching from a Brazilian Nickel
2020.10.7 The kinetics of atmospheric sulfuric acid leaching from a Brazilian nickel laterite ore was assessed using distinct reducing agents and ore mineralogy. This transitional ore contains 1.63% Ni distributed as 1.27% in coarse size (− 500 + 150 μm), mainly as silicates (lizardite and chlorite — 28.6%), and 2.06% in the fines fraction (− 75
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A Critical Review on the Mineralogy and Processing for High
2020.6.22 High-purity quartz (SiO2) is an important material widely used in many industries, including semiconductor technology, telecommunication, and optics. The content and distribution of impurities in quartz significantly affect the processing methods. This paper provides an insightful review on the processing of high-purity quartz, covering the
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Comprehensive Review on Metallurgical Upgradation
2022.2.11 The main reactions during the pressure acid leaching process are shown as following [31, 34]: 2Ni + O 2 + 2H 2 SO 4 = 2NiSO 4 + 2H 2 O. 6. ... Nickel extraction technology from nickel sulfide ore based on “sulfated roasting–water leaching” can achieve high efficiency and clean extraction of nickel, but how to improve the utilization ...
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(PDF) Concentration and Separation of Scandium
2017.12.12 Scandium is usually extracted by the high-pressure acid leaching (HPAL) process, followed by the concentration and separation of scandium from the pregnant leach solution by using the pH ...
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Computer modeling of high-pressure leaching process of
2012.7.18 Due to the complex chemical composition of nickel ores, the requests for the decrease of production costs, and the increase of nickel extraction in the existing depletion of high-grade sulfide ores around the world, computer modeling of nickel ore leaching process became a need and a challenge. In this paper, the design of
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High-efficiency recycling of copper-cadmium slag by
2023.5.15 Pressure leaching can effectively improve the leaching efficiency of minerals. However, pressure acid leaching causes corrosion of equipment and increases treatment costs. Therefore, atmospheric pressure oxidative acid leaching has gained popularity and the selection of suitable oxidants for mineral leaching has become a focal
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Iron Removal from Bauxite by Oxalic Acid and Further Al Extraction
2023.4.17 Experimental Method. In this study, the recovery of precious metals from bauxite ore was examined by a two-stage leaching process. The stages of this process were Stage I: Removing iron to a large extent and revealing the solubility conditions of titanium by treating the bauxite ore with oxalic acid, Stage II: Determining the recovery conditions of
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Minerals Free Full-Text Efficient Recovery of Vanadium from High ...
2022.1.28 High-chromium vanadium slag (HCVS) is an important by-product generated during the smelting process of high-chromium-vanadium-titanium-magnetite. Direct acid leaching and calcium-roasting acid leaching technology were applied to recover vanadium and chromium from HCVS. The effects of experimental parameters on the
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Research on conventional leaching process and leaching
2023.11.7 To investigate the leaching rules and mechanism of a hard rock uranium ore, this paper conducted conventional leaching experiments based on the chemical composition and mineral occurrence status of the ore. ... High-efficiency extraction of Al from coal-series kaolinite and its kinetics by calcination and pressure acid leaching. Appl Clay
MoreComprehensive review on metallurgical recycling and
2021.5.1 The primary purpose of the paper is to provide a critical review on the metallurgical processes available for recycling and further cleaning of copper slag. In this review, the generation mechanism, and chemical/physical characteristics of copper slag are introduced, and then the primary and lately developed processes for their metallurgical ...
MoreNickel Recovery Optimization and Kinetic Study of Morowali
2023.1.4 Nickel plays a critical role in the mining industry. However, the presence of nickel in the primary source of sulfide minerals is decreasing. Focus has since turned to laterite ore, which contains up to 80% Ni metal. The purpose of this study was to optimize nickel leaching using sulfuric acid and conduct a kinetic analysis to discover the
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Full article: The Direct Leaching of Nickel Sulfide Flotation ...
2022.5.16 High pressure acid leaching (HPAL) is the preferred method for the extraction of Ni and Co from oxide (limonite) and clay silicate type ores to produce a diverse range of products (i.e. mixed sulfide precipitate, mixed hydroxide precipitate, metal powder, cathode) whilst saprolitic ores are generally processed via pyrometallurgy to produce ...
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